Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1998-07-20
2000-02-22
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
13750542, 137613, G05D 701
Patent
active
060268492
ABSTRACT:
A flow regulator having a first and second stages of regulation. The first stage is a pressure regulation stage that maintains the pressure within an intermediate chamber (formed by a series of interconnected passageways and cavities) within a predetermined range above the pressure in an outlet port. The second stage maintains the flow rate within a predetermined range about a target flow rate. Both stages sample the pressure in the outlet port and automatically adjust the flow of fluid to ensure that fluctuations in pressure at the inlet and outlet ports do not affect the flow rate. The flow rate is set and controlled by a piston and valve arrangement. The pressure is regulated by a similar piston and valve arrangement. A flexible membrane is used to allow pressures in one chamber to be transferred into a control signal that operates a control valve in another chamber. One or more of several types of control valves may be used depending upon such factors as the input pressure and the type of fluid being controlled. The controller can be easily manufactured using injected molded steel or plastic with minimal milling passageways after the molding process.
REFERENCES:
patent: 4015626 (1977-04-01), Thordarson
patent: 4096746 (1978-06-01), Wilson et al.
patent: 4210171 (1980-07-01), Rikuta
patent: 4629561 (1986-12-01), Shirato et al.
patent: 5329966 (1994-07-01), Fenimore et al.
Hepperle Stephen M.
Schacht Michael R.
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